Lighting apparatus

ABSTRACT

A lighting apparatus of the present invention includes: a light source; a power source unit arranged to power the light source; a detector unit arranged to detect the deterioration of ability of the power source unit to power the light source; and a determination unit arranged to determine the life of the power source unit in response to the detector unit.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the following Japanese Patent Applications,the contents of which are hereby incorporated by reference.

-   (1) Japanese Patent Application No. 2010-116578 filed on May 20,    2010-   (2) Japanese Patent Application No. 2010-120740 filed on May 26,    2010-   (3) Japanese Patent Application No. 2010-123678 filed on May 31,    2010

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to lighting apparatuses.

2. Description of Related Art

A lighting apparatus is a typical electrical device. A fluorescent lampis usually used as a light source of the lighting apparatus; in recentyears, more and more LEDs have been utilized, and thus it is proposedthat a white LED is configured to be compatible with the fluorescentlamp and that the white LED is used for general ceiling illumination(JP-A-2004-335426). On the other hand, various proposals have been madeas to control of the lighting apparatus. For example, it is proposedthat IC tag seals attached to a large number of fluorescent lamps and anIC tag reader/writer which covers an entire building withelectromagnetic communication communicate with each other, and thus,when each fluorescent lamp has been used for a predetermined period oftime since the start of use of the fluorescent lamp, a notification ofits replacement is automatically provided (JP-A-2006-85344).Furthermore, it is proposed on illumination using LEDs that thechronological change level of an LED chip is determined based on arelationship between the value of a current flowing through the LED chipand an optical output of the LED chip detected by an optical detectionelement and characteristic data obtained by making such a relationshipcorrespond to the chronological change level, and a notification of thislevel is provided from a lighting apparatus to a controller, and thelevel is displayed (JP-A-2010-34240).

However, with respect to the management of electrical devices such as alighting apparatus (for example, the management of the life of alighting apparatus), there are a large number of problems with which tofurther cope with

SUMMARY OF THE INVENTION

In view of the foregoing problem found by the applicant, an object ofthe present invention is to provide a lighting apparatus that canperform appropriate life management.

To achieve the above object, according to the present invention, thereis provided a lighting apparatus for illumination with a light sourceincluding: a power source unit arranged to power the light source; adetector unit arranged to detect the deterioration of ability of thepower source unit to power the light source; and a determination unitarranged to determine duration of life of the power source unit inresponse to the detector unit.

Other features, elements, steps, advantages and characteristic of thepresent invention will be further obvious from the following detaileddescription of preferred embodiments and the corresponding accompanyingdrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 A block diagram showing a first embodiment of an LED lightingsystem according to embodiments of the present invention (firstembodiment);

FIG. 2 A block diagram showing the detailed configuration of the LEDlighting apparatus of FIG. 1;

FIG. 3 A flowchart showing the basic function of an illumination controlunit shown in FIGS. 1 and 2;

FIG. 4 A flowchart showing the details of step S4 of FIG. 3;

FIG. 5 A flowchart showing the details of step S26 of FIG. 3;

FIG. 6 A flowchart showing the details of step S32 of FIG. 3;

FIG. 7 A flowchart showing the function of a remote control unit shownin FIG. 1;

FIG. 8 A block diagram showing the detailed configuration of an LEDlighting apparatus of a second embodiment of the LED lighting systemaccording to embodiments of the present invention (second embodiment);

FIG. 9 A flowchart showing the basic function of an illumination controlunit shown in FIGS. 1 and 8 and according to the second embodiment;

FIG. 10 A flowchart showing the details of step S144 shown in FIG. 9 andaccording to the second embodiment;

FIG. 11 A block diagram showing a third embodiment of an LED lightingsystem according to embodiments of the present invention (thirdembodiment);

FIG. 12 A flowchart showing the basic function of an illuminationcontrol unit shown in FIG. 11 and according to the third embodiment;

FIG. 13 A block diagram showing a fourth embodiment of an LED lightingsystem according to embodiments of the present invention (fourthembodiment);

FIG. 14 A flowchart showing the basic function of a meter control unitshown in FIG. 13; and

FIG. 15 A flowchart showing the details of step S244 in the flow of FIG.14.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS First Embodiment

FIG. 1 is a block diagram showing a first embodiment of an LED lightingsystem according to embodiments of the present invention. The lightingsystem of the first embodiment includes: an LED lighting apparatus 4provided on a ceiling 2; an LED lighting apparatus 6 provided on theceiling 2; a fire alarm apparatus 8 provided on the ceiling 2; and aremote controller 10 that collectively controls these apparatuses.Although, in an enterprise office or the like, a large number oflighting apparatuses are arranged on the ceiling 2, only two lightingapparatuses are shown in FIG. 1 as representatives for ease ofillustration. The LED lighting apparatuses 4 and 6 and the fire alarmapparatus 8 are powered by an electrical power line 12. On the otherhand, the remote controller 10 is battery-operated. The LED lightingapparatuses 4 and 6 and the fire alarm apparatus 8 communicate with theremote controller 10 by infrared wireless communication or near fieldradio wireless communication that will be described later. When theremote controller 10 is operated through a power line by being fixed toa room wall or the like, the LED lighting apparatuses 4 and 6, the firealarm apparatus 8 and the remote controller 10 can be configured so thatthe lighting apparatuses 4 and 6 and the fire alarm apparatus 8communicate with the remote controller 10 by power line communication(PLC).

The LED lighting apparatus 4 is configured such that, when its lifeends, the LED lighting apparatus 4 can be removed from the ceiling 2 andreplaced; the LED lighting apparatus 4 has a white LED group 14 as anillumination light source. The white LED group 14 is powered from apower source unit 16 connected to the electrical power line 12, iscontrolled in light intensity by an LED control unit 18 and therebyemits light. The power source unit 16 supplies an electric power havinga predetermined voltage not only to the white LED group 14 but also tothe individual portions of the LED lighting apparatus 4. An illuminationcontrol unit 20 has a microcomputer operated by a reference clock 22 anda predetermined program, provides instructions to turn on and off thewhite LED group through the LED control unit 18 based on a remotecontrol signal received by a wireless communication unit 24 and toadjust light intensity, and manages the life of the LED lightingapparatus 4. The illumination control unit 20 has a storage unit thatstores the program of the microcomputer and the data necessary forprocessing. The wireless communication unit 24 may be configured as anear field radio communication unit.

An LED life determination unit 26 determines the life of the white LEDgroup 14 based on instruction signals, from the illumination controlunit 20 to the LED control unit 18, for the turning on and off and thelight intensity adjustment, the temperature of the white LED group 14and the reference clock 22, and transmits its result to the illuminationcontrol unit 20. An electrolytic capacitor life determination unit 28determines the life of an electrolytic capacitor included in the powersource unit 16 based on the ability of rectification and smoothing ofthe power source unit 16 and the reference clock 22, and transmits itsresult to the illumination control unit 20. When the illuminationcontrol unit 20 determines that the life ends, an instruction to turnoff the white LED group 14 is provided to the LED control unit 18. Sincethe configuration of the LED lighting apparatus 6 is the same as that ofthe LED lighting apparatus 4, the provision of a symbol in the figureand its description are omitted.

Although the life determination and the management discussed above aredescribed in detail later, the significance thereof will be describedhere, While, advantageously, an LED lighting apparatus having a lifethat is significantly longer than that of a common fluorescent lamp tubedoes not need to be replaced for a long period of time, memory andrecord on the previous replacement is highly likely to be lost, and itis problematic to manage the subsequent replacement time. Since, in acommon fluorescent lamp tube, an obvious failure is found in thelighting at the end of the life or the lighting is impossible toperform, the need for the replacement is clearly found. By contrast, inthe LED lighting apparatus, brightness is gradually reduced as it isused for a long period of time but an obvious failure or a state wherethe lighting cannot be performed is not found. Hence, it is likely thata person who performs an operation or lives in the dimly lit areadescribed above cannot realize the reduction in brightness andconsequently the person performs an operation or lives in a dimly litarea under unhealthy conditions without realizing it. The lifedetermination and the management are a significant measure to cope withsuch a problem.

The fire alarm apparatus 8 has a power source unit 30 that is connectedto the electrical power line 12 and that supplies a power having apredetermined voltage to the portions of the fire alarm apparatus 8. Thepower source unit 30 may be battery-operated. An alarm control unit 32issues a warning through a sound warning unit 36 and an optical warningunit 38 based on the detection by a temperature-smoke-flame sensor 34 atthe time of abnormality. A wireless communication unit 40 connected tothe alarm control unit 32 transmits an abnormal state to the outside,and communicates with the outside when the fire alarm apparatus 8 istested. The alarm control unit 32 is provided with a light receivingunit 35 that performs the function of the fire alarm apparatus 8 itselfand that is also powered from the power source unit 30, and detects anillumination within a room. Information on the illumination within theroom detected by the light receiving sensor 35 serves as information forautomatic light intensity adjustment performed by the LED lightingapparatuses 4 and 6 as will be described later. Since the lightreceiving unit 35 powered by the power source unit 30 is used for lightintensity adjustment on a daily basis, the power source unit 30 of thefire alarm apparatus 8, which is not operated for a long period of timeas long an abnormal state is not found, is checked on a daily basis,with the result that an failure to perform the operation when it needsto be performed is prevented.

The remote controller 10 has an operation unit 42 for performing amanual operation, and a remote control unit 44 controls a wirelesscommunication unit 46 based on the operation of the operation unit 42 totransmit infrared light 48 and/or infrared light 50 to the LED lightingapparatus 4 and/or the wireless communication unit 24 of the LEDlighting apparatus 6. When the wireless communication unit 24 and thewireless communication unit 46 are configured as the near field radiocommunication unit, the infrared light 48 and the infrared light 50 arereplaced with ratio waves. In these wireless communication units 24 and46, a one-way instruction can be provided from the remote controller 10to the LED lighting apparatuses 4 and 6 and moreover, two-waycommunication can be performed, and the information on the life of theLED lighting apparatuses 4 and 6 can be received by the remotecontroller 10 and displayed on a display unit 52. The two-waycommunication function and the display function of the display unit 52described above are also utilized in the tests of the life determinationunits 26 and 28. When normal lighting or light intensity adjustmentcontrol is performed, the display unit 52 is also utilized as agraphical user interface (GUI) that works in corporation with theoperation unit 42. Furthermore, the remote controller 10 relays theinformation on the illumination within the room from the light receivingunit 35 of the fire alarm apparatus 8 as automatic light intensityadjustment information to the LED lighting apparatuses 4 and 6.

The remote controller 10 is also used in the test of the fire alarmapparatus 8. In the test, based on the operation of the GUI by theoperation unit 42 and the display unit 52, the remote control unit 44instructs the wireless communication unit 46 to transmit a testinstruction signal of infrared light 54. The transmitted testinstruction signal is received by the wireless communication unit 40 ofthe fire alarm apparatus 8. Based on this, the alarm control unit 32performs a predetermined test, and instructs the wireless communicationunit 40 to transmit a test result signal of the infrared light 54. Thetest result signal of the infrared light 54 is received by the remotecontroller 10, and is displayed on the display unit 52 through controlby the remote control unit 44. The test of the fire alarm apparatus 8 asdescribed above is performed in corporation with the tests of the LEDlighting apparatuses 4 and 6. The details thereof will be describedlater.

FIG. 2 is a block diagram showing the detailed configuration of the LEDlighting apparatus of FIG. 1. The same parts as shown in FIG. 1 areidentified with identical reference numerals, and their description willnot be repeated as long as it is not needed. In the power source unit16, an alternating current of the electrical power line 12 is steppeddown by a transformer 56, is rectified by a full-wave rectifier 58, issmoothed out by an electrolytic capacitor 60 and is supplied to adirect-current power supply circuit 62. The white LED group 14, a switchelement 64 and a constant current source 66 are connected in seriesbetween the direct-current power supply circuit 62 and ground. Theturning on and off of the switch element 64 is controlled by a PWMcontrol unit 68, and thus the turning on and off of the white LED group14 and the light intensity adjustment when the white LED group 14 isturned on are performed. The duty cycle of the PWM control by the PWMcontrol unit 68 is given by a duty control unit 70 based on aninstruction signal from the illumination control unit 20. That the dutycycle is zero means that the white LED group 14 is turned off. Theswitch element 64, the constant current source 66, the PWM control unit68 and the duty control unit 70 constitute the LED control unit 18.

A nonvolatile counter 72 of the LED life determination unit 26 countsclock pulses from the reference clock 22 frequency divided by a variablefrequency division unit 76 through a gate 74 that is opened when aturn-on signal (signal other than duty zero) is output from theillumination control unit 20. Thus, the nonvolatile counter 72accumulatively counts and stores the time during which the white LEDgroup 14 is turned on. When the nonvolatile counter 72 counts pulsescorresponding to the time when the life of the white LED group 14 isassumed to come to an end (for example, brightness of light emitted bythe same input is reduced to 70% of that of a new one), an over flowpulse is output to the illumination control unit 20, and thus this isassumed to be the determination of the life of the LEDs.

The turn-on signal is input from the illumination control unit 20 to thevariable frequency division unit 76, and the frequency of an outputpulse is increased as the duty cycle of the turn-on signal is higher,with the result that the count by the nonvolatile counter 72 is made toproceed more quickly. This copes with a case where, as the energy of thecurrent flowing through the white LED group 14 is larger, the life endsmore quickly. A thermistor 80 is provided on a heat dissipation plate 78of the white LED group 14, and detects the state of heat dissipation.The temperature detected by the thermistor 80 is input to the variablefrequency division unit 76, and the frequency of the output pulse isincreased as the temperature is higher, with the result that the countby the nonvolatile counter 72 is made to proceed more quickly. Thiscopes with a case where, as the temperature of the white LED group 14when it is heated is higher, the life ends more quickly.

A comparator 82 of the electrolytic capacitor life determination unit 28compares, with a reference voltage, a division voltage (division voltageof the smoothed voltage generated with the electrolytic capacitor 60)generated by a detection resistor 83, and generates, when a low voltageportion of the division voltage that is brought into the state of apulsating current due to the reduced smoothing ability of theelectrolytic capacitor 60 becomes lower than the reference voltage, anoutput in synchronization with the pulsating current. A counter 84counts this, and outputs the over flow pulse to the illumination controlunit 20, and thus this is assumed to be the determination of the life ofthe electrolytic capacitor. The clock pulse from the reference clock 22is input to the reset terminal of the counter 84 through a frequencydivision unit 86. Thus, the counter 84 is periodically reset (forexample, when the counter 84 is configured such that an overflow thereofoccurs at 128 pulse counts, one reset is performed per second), and anoverflow of the counter 84 is prevented from occurring as long as thepulse based on the pulsating current from the comparator 82 does notcontinue for about a little less than one second. Hence, when thesmoothing ability of the electrolytic capacitor 60 is reliably reduced,this is assumed to be the end of the life, and an erroneous operation isprevented such as a case where a noise pulse, such as when the divisionvoltage generated by the detection resistor 83 is temporarily reduced,is determined to be the end of the life as the accumulative count.

FIG. 3 is a flowchart showing the basic function of the illuminationcontrol unit 20 shown in FIGS. 1 and 2. The flow starts when anoperation signal such as the turn-on signal from the remote controller10 or a life determination function test signal is received. When theflow starts, whether or not the turn-on signal is received is checked instep S2, and, if the turn-on signal is received, the process proceeds tostep S4 where life determination check processing is performed and theprocess proceed to step S6. The life determination check processing instep S4 is processing for checking whether or not the determination asto whether the life of the electrolytic capacitor 60 ends or whether thelife of the white LED group 14 ends is performed; its details will bedescribed later.

In step S6, as a result of the life determination check in step S4,whether or not the determination as to whether the life of theelectrolytic capacitor 60 ends is performed is checked, and, if thedetermination is not performed, the process proceeds to step S8 where,as a result of the life determination check in step S4, whether or notthe determination as to whether the life of the white LED group 14 endsis performed is checked. If the life of the white LED group 14 isdetermined to end, the process proceeds to step S10 where whether or notthe turn-on signal recognized to be received in step S2 is a turn-onsignal within a predetermined period of time (for example, 30 seconds)after the white LED group 14 is determined to end and then the LEDlighting apparatus 4 is automatically turned off is checked. This isbecause, in an instant turn-off mode, which will be described later,when the lit LED lighting apparatus 4 is suddenly automatically turnedoff according to the determination that its life ends, relighting isallowed by performing a turn-on operation within a predetermined periodof time.

If the operation is not the operation corresponding to step S10, theprocess proceeds to step S12 where whether or not the turn-on signalrecognized to be received in step S2 is received within a predeterminedperiod of time (for example, 1 second) after the preceding operation ischecked. This is performed so that, even if the life of the white LEDgroup 14 is determined to end and the LED lighting apparatus 4 is notturned on by a normal turn-on operation, lighting can be carried out byperforming a special operation, that is, continuously performing anoperation at the intervals of one second or less. If the operation isthe operation corresponding to step S12, the process proceeds to stepS14 where, after the life of the white LED group 14 is determined toend, whether or not the operation is an operation of a predeterminednumber of times (for example, five times) or less is checked. This isperformed so that, for ease of use, even if the life of the white LEDgroup 14 ends, lighting performed by the special operation that is thecontinuous operation is allowed but a predetermined limit is placed onthe number of times and the turn-on operation is prevented from beingcontinued for a long time even though the life of the white LED group 14ends.

If, in step S14, the operation is the operation of the predeterminednumber of times or less, the process proceeds to step S16 where thenumber of times of reception of an operation signal is incremented onetime and the process proceeds to step S18 where the white LED group 14is turned on. On the other hand, if, in step S8, the life of the whiteLED group 14 is not determined to end, the process directly moves tostep S18 where the white LED group 14 is immediately turned on. If, instep S10, the white LED group 14 is recognized, by the lifedetermination, to be a turn-on signal of the predetermined period oftime or less after the automatic turning off, the process also directlyproceeds to step S18 where the white LED group 14 is turned on.

If, in step S18, the white LED group 14 is turned on, the processproceeds to step S20 where whether or not a determination signalindicating that the life of the electrolytic capacitor 60 or the whiteLED group 14 ends while it is being kept on is generated is generated ischecked. Then, if the determination signal indicating that the life endsis generated, in step S22, the result of this determination is storedand is transmitted to the remote controller 10, and the process moves tostep S24. In step S24, whether or not a mode in which the determinationsignal indicating that the life ends is generated and the white LEDgroup 14 is instantly turned off is set is checked. If the mode is notthe instant turn-off mode, the white LED group 14 is not turned off atthis time, and the process proceeds to step aS26. Since thedetermination that the life ends is stored in step S22, when the turn-onoperation is performed next time, this is checked by checking in stepS4, and, unless this corresponds to step S10 or to both steps S12 andS14, lighting cannot be performed. On the other hand, if, in step S20,the signal indicating that the life ends is not generated, the processdirectly moves to step S26.

In step S26, light intensity adjustment processing for automatic ormanual light intensity adjustment is performed. The details thereof willbe described later. If the light intensity adjustment processing iscompleted, the process proceeds to step S28 where whether or not theturn-off signal is received from the remote controller 10 is checked. Ifthe turn-off signal is not received, the process returns to step S20,and thereafter, unless the turn-off signal is received and the signalindicating the life ends is generated in the instant turn-off mode,processing from step S20 to S28 is repeated to correspond to the lightintensity adjustment control or the variation of the state of the life.On the other hand, if, in step S28, the turn-off signal is recognized tobe received, the process moves to step S30. If, in step S2, the turn-onsignal is not recognized to be received, the process moves to step S30.

In step S30, whether or not a signal resulting from an operation such asa life determination test signal or a pseudo life end limit signal,which will be described later, is received is checked. Then, if thissignal is recognized to be received, operation processing in step S32 isperformed and the flow is completed. On the other hand, if the operationsignal is not recognized to be received in step S30, the flow isimmediately completed.

Here, if, in step S6, the life of the electrolytic capacitor 60 isdetermined to end, the process moves to step S34 where informationindicating “non-lighting” is transmitted to the remote controller 10,and the flow is immediately completed. Here, if comparison with a casewhere the life of the white LED group 14 ends is made, in this case, theamount of light emission is simply insufficient and this is not urgent,and hence, for convenience of use, as already described, re-lighting isallowed under a predetermined limitation. However, in a case where thelife of the electrolytic capacitor 60 ends, in consideration of a slightpossibility that an unexpected event such as the occurrence of ignitionis encountered due to continuous use, means for allowing re-lighting isnot provided unlike the case where the life of the white LED group 14ends.

The following description is also related to what has been describedabove, and, if, when the life of the white LED group 14 ends, in stepS12, it is not detected that the signal is the turn-on signal within apredetermined period of time after the preceding operation, the processproceeds to step S36 where an instruction signal of a guidance displaysaying that continuous operation allows lighting to be performed up to apredetermined number of times is transmitted to the remote controller10, and the process moves to step S34. On the other hand, if, in stepS14, it is detected that lighting is carried out by performingcontinuous operation a predetermined number of times or more, theprocess immediately moves to step S34. In both cases, the lightingcorresponding to the turn-on operation is not performed. If, in stepS24, the mode is the instant turn-off mode, the process moves to stepS38 where the white LED group 14 is instantly turned off, and, in stepS40, an instruction signal of a guidance display saying that, when theturn-on operation is performed within a predetermined period of time,the re-lighting can be performed is transmitted to the remote controller10 and the process moves to step S34.

FIG. 4 is a flowchart showing the details of the life determinationcheck processing in step S4 of FIG. 3. When the flow starts, in stepS42, whether or not the determination that the life of the electrolyticcapacitor 60 ends is stored is checked. If this memory is not present,the process proceeds to step S44 where whether or not the determinationthat the life of the white LED group 14 ends is stored is checked. Ifthis memory is recognized to be present, the process proceeds to stepS46 where an LED life end determination memory in its own LED lightingapparatus 4 is first activated, and the process moves to step S48.

Then, in step S48, information on another LED lighting apparatus 6 isacquired through the remote controller 10, and, in step S50, whether ornot information indicating that the life of LEDs in the another LEDlighting apparatus (for example, the LED lighting apparatus 6) ends ispresent is checked. Then, if the corresponding information is present,in step S52, whether or not a time stamp of the information that thelife of LEDs in the another LED lighting apparatus ends precedes a timestamp of the information that the life of LEDs in the own LED lightingapparatus 4 ends is checked. Consequently, if the time stamp in theanother LED lighting apparatus precedes, the process proceeds to stepS54 where the LED life end determination memory in the own LED lightingapparatus 4 is inactivated, and the flow is completed.

As described above, in the life determination check flow, information isexchanged with the another LED lighting apparatus within the same room,thus as long as an LED lighting apparatus in which the life of LEDs endsbefore is present, a notification of the end of the life throughnon-lighting is left to the LED lighting apparatus for the time being,the LED life end determination memory in the own LED lighting apparatus4 is inactivated, the life is assumed not to end and lighting isallowed. In this way, a plurality of LED lighting apparatuses within thesame room are prevented from being simultaneously turned off due to theend of the life of LEDs, and the LED lighting apparatus with the oldesttime stamp is only turned off as a representative and thus anotification of the end of life is provided. Then, when the older LEDlighting apparatus is replaced and the time stamp of the own LEDlighting apparatus 4 becomes the oldest, a determination memoryindicating that the life of LEDs ends is activated and the turning offis performed.

On the other hand, if, in step S42, the life of the electrolyticcapacitor 60 ends, a high priority is given to safety as compared withthe inconvenience in which a plurality of LED lighting apparatuses aresimultaneously turned off, and, in the own LED lighting apparatus 4, amemory indicating that the life of the electrolytic capacitor 60 ends isalways activated. If, in step S44, a memory indicating that the life ofthe white LED group 14 ends is not present, the flow is immediatelycompleted. If, in step S50, information indicating that the life of LEDsends in the another LED lighting apparatus is not present, or if, instep S52, the another LED lighting apparatus in which the life of LEDsends and which has an older time stamp is not present, the activation ofthe LED life end memory in the own LED lighting apparatus 4 in step S46is maintained and the flow is completed.

FIG. 5 is a flowchart showing the details of the light intensityadjustment in step S26 of FIG. 3. When the flow starts, in step S62, thefire alarm apparatus 8 is required through the remote controller 10 toprovide an illumination signal. Then, the process proceeds to step S64where whether or not a response to the illumination signal measured bythe light receiving unit 35 is received through the remote controller 10from the fire alarm apparatus 8 is checked. If the response is received,the process proceeds to step S66 where whether or not the LED lightingapparatus 4 is set in an automatic light intensity adjustment mode ischecked. Then, if the LED lighting apparatus 4 is set in the automaticlight intensity adjustment mode, the process proceeds to step S68 wherewhether or not the illumination within the room measured by the firealarm apparatus 8 is equal to or more than a predetermined one ischecked. Consequently, if the illumination within the room is equal toor more than the predetermined one, the process proceeds to step S70where a current duty signal is stored and, instead of this, anenergy-saving duty signal is output in step S72, and the processproceeds to step S74. The energy-saving duty signal generally indicatesa duty cycle smaller than the duty signal stored in step S70; when theroom is brighter than a predetermined brightness and additionalillumination is unnecessary, light emission from the LED lightingapparatus 4 is automatically reduced, with the result that itcontributes to energy saving.

On the other hand, if, in step S68, the illumination within the room isnot detected to be equal to or more than the predetermined one, theprocess proceeds to step S76 where whether or not the energy-saving dutycycle is currently applied is checked. If the energy-saving duty cycleis applied, the process proceeds to step S78 where the duty signalstored before the energy-saving duty cycle is applied is read andoutput, and the process moves to step S74. On the other hand, if, instep S76, the application of the energy-saving duty cycle is notdetected, the process directly moves to step S74. As described above, ifthe brightness within the room is equal to or less than thepredetermined one, lighting is performed with a general duty cyclewhereas if the energy-saving duty is applied, a return to the lightingwith the normal duty cycle is performed. If, in step S66, the mode isnot detected to be the automatic light intensity adjustment mode, theautomatic light intensity adjustment is not performed regardless of theillumination signal to which the response is made in step S64, and theprocess directly moves to step S74.

If, in step S64, the response to the illumination signal is notdetected, power supply for achieving the function of the light receivingunit 35 of the fire alarm apparatus 8 probably has a problem. Since thelight receiving unit 35 receives both power through the functionalportion of the fire alarm apparatus 8 itself such as thetemperature-smoke-flame sensor 34 and power from the common power sourceunit 30, when the power supply to the light receiving unit 35 has aproblem, the power supply to the functional portion of the fire alarmapparatus 8 itself probably has a problem, too. Hence, if, in step S64,the response to the illumination signal is not detected, the processmoves to step S80 where information indicating “fire alarm apparatuspower supply failure” is transmitted to the remote controller 10, andthe process moves to step S74. As described above, the light receivingunit 35 provided in the fire alarm apparatus 8 is used for the lightintensity adjustment, and thus the operation of the fire alarm apparatus8, which is desired not to be performed for a long period of time ischecked on a daily basis, with the result that the failure of theoperation when it is necessary is prevented.

In step S74, whether or not a manual light intensity adjustment signalgenerated based on the operation of the operation unit 42 of the remotecontroller 10 is received is checked. Then, if the manual lightintensity adjustment signal is received, the process proceeds to stepS82 where a new duty cycle signal based on a manual setting is output,and the flow is completed. Although, as described above, in the lightintensity adjustment processing, the brightness of the LED lightingapparatus 4 can be changed automatically or manually, when theillumination within the room is equal to or more than the predeterminedone in the automatic light intensity adjustment mode, a higher priorityis given to the energy-saving duty. Regardless of the setting of theautomatic light intensity adjustment mode, the fire alarm apparatus 8 isconstantly checked with the illumination signal.

FIG. 6 is a flowchart showing the details of the operation processing instep S32 of FIG. 3. When the flow starts, first, in step S92, whether ornot an operation signal received from the remote controller 10 is aninstruction signal for the test of a life determination function ischecked. If the operation signal is the function test signal, first, instep S94, the function of the LED life determination unit 26 is checked.This check includes, for example, a passage test of a pulse from thereference clock 22 to the variable frequency division unit 76 and thegate 74, a frequency division ratio change function test of the variablefrequency division unit 76 and the counting of the nonvolatile counter72 with a count value temporarily put aside and an overflow test.

Furthermore, in step S96, the function of the electrolytic capacitorlife determination unit 28 is checked. This check includes, for example,the comparison function check of the comparator 82, the counting of thecounter 84 and the overflow test. Then, in step S98, based on theresults of these function checks, whether or not all functions of thelife determination unit are normal is checked. Then, if a failure isfound, the process proceeds to step S100 where a pseudo state where thelife of the electrolytic capacitor 60 ends is set, and the processproceeds to step S102. On the other hand, if, in step S98, all functionsof the life determination unit are recognized to be normal, the processdirectly proceeds to step S102 with being further treated.

If the pseudo state which is set in step S100 as described above and inwhich the life of the electrolytic capacitor ends is checked in step S6,the function of moving the flow to step S34 is held. In this case, whenthe functions of the life determination unit are not normal, the LEDlighting apparatus 4 is not turned on even by performing the turn-onoperation. If the pseudo state where the life of the electrolyticcapacitor ends is checked in step S20, in the instant turn-off mode, theflow is moved to step S38 through step S24. In this case, the failure ofthe functions of the life determination unit causes the LED lightingapparatus 4 being kept on to be instantly turned off through a testoperation. In both cases, the non-lighting or the turning off of the LEDlighting apparatus 4 described above is performed, and thus anotification of the failure of the functions of the life determinationunit is provided without failing to recognize any failure.

In step 102, test results of the life determination functions of thewhite LED group 14 and the electrolytic capacitor 60 based on the checksin steps S94 and S96 are specifically transmitted to the remotecontroller 10, and the process moves to step S104. Since the remotecontroller 10 displays this information on the display unit 52, anoperator who performs the test operation can specifically find theresults. If, in step S92, the operation signal received from the remotecontroller 10 is not detected to be an instruction signal for the testof the life determination function, the flow directly moves to stepS104.

In step S104, whether or not the operation signal received from theremote controller 10 is the pseudo life end limit signal is checked. Ifso, the process proceeds to step S106 where the electrolytic capacitorpseudo life end limit state that is set is reset, and the flow iscompleted. On the other hand, if the received operation signal is notthe pseudo life end limit signal, the flow is immediately completed.Since, as described above, the electrolytic capacitor pseudo life endlimit state set in step S100 causes the non-lighting or the turning offof the LED lighting apparatus 4, when the cause thereof is found and theLED lighting apparatus 4 is turned on for the time being, this is resetand thus it is possible to turn on the LED lighting apparatus 4. Forthis purpose, the reset signal detected in step S104 is transmitted by amanual operation from the remote controller 10.

FIG. 7 is a flowchart showing the function of the remote control unit 44shown in FIG. 1. The flow is started either by performing the operationof the operation unit 42 for operating the LED lighting apparatuses 4and 6 or the fire alarm apparatus 8 or by the reception of a signal bythe wireless communication unit 46 from the LED lighting apparatuses 4and 6 or the fire alarm apparatus 8. When the flow starts, first, instep S112, whether or not the turn-on operation is performed is checked.If the turn-on operation is performed, the process proceeds to step S114where the turn-on signal is transmitted to the LED lighting apparatus 4and the LED lighting apparatus 6, and the process moves to step S116. Onthe other hand, if, in step S112, the turn-on operation is not detected,the process immediately moves to step S116.

In step S116, whether or not a signal indicating “non-lighting” isreceived from any of the LED lighting apparatuses 4 and 6 and the likeis checked. If the signal is received, the process proceeds to step S118where the received life end determination result is displayed on thedisplay unit 52. Then, in step S120, whether or not a signal indicatingthat “turn-on operation guidance” is performed is received from the LEDlighting apparatuses 4 and 6 and the like is checked. If the signal isreceived, the process proceeds to step S122 where an instruction toproduce a display saying the “lighting can be performed if the operationis continuously performed within a predetermined period of time” isprovided to the display unit 52, and the process moves to step S124. Onthe other hand, if, in step S120, the reception of the signal indicatingthat “turn-on operation guidance” is performed is not detected, theprocess directly moves to step S124.

In step S124, when the pseudo life end limit state set based on the lifedetermination function test result causes the “non-lighting” or theturning off of the LED lighting apparatuses 4 an 6, whether or not anoperation for resetting this is performed is checked, and, if theoperation is performed, the process proceeds to step S126 where a signalfor resetting the pseudo life end limit state is transmitted to thecorresponding LED lighting apparatus, and the process moves to stepS128. On the other hand, if, in step S124, the reset operation is notdetected, the process directly moves to step S128.

If, in step S116, the reception of the signal indicating “non-lighting”is not detected, the process directly moves to step S128, too. Hence, inthis case, the guidance display in step S122 is not produced, and thusit is possible to avoid confusion resulting from an unnecessary display.Since the pseudo life end reset operation is not checked in step S124,the response to the erroneous operation of the pseudo life end reset isprevented from causing the function to be confused.

In step S128, whether or not an operation for testing the lifedetermination function of the LED lighting apparatuses 4 and 6 isperformed is checked. If this operation is not detected, the processproceeds to step S130 where whether or not an operation for testing thefire alarm apparatus 8 is performed is checked. In both cases where, instep S128, the life determination function test operation is detectedand where, in step S130, the fire alarm apparatus test operation isdetected, the process proceeds to step S132 where a life determinationfunction test signal is transmitted to the LED lighting apparatuses 4and 6 and a fire alarm apparatus test signal is transmitted to the firealarm apparatus 8. In step S134, the results of the function tests arereceived from the LED lighting apparatuses 4 and 6 and the fire alarmapparatus 8, and these are displayed side by side on the display unit52, and the process moves to step S136. On the other hand, if, in bothsteps S128 and S130, no test operations are detected, the processdirectly moves to step S136.

As described above, in the flow of FIG. 7, even when any of the testoperations is performed, the test of the life determination function ofthe LED lighting apparatuses 4 and 6 and the test of the fire alarmapparatus 8 are performed as a pair without fail, and the resultsthereof are displayed side by side. Although the end of the life of theLED lighting apparatuses 4 and 6 and a notification of fire through thefire alarm apparatus 8 are desired not to be performed for a long periodof time, it is inevitable to perform tests in order to guarantee thefunction when it is necessary. The above configuration has the followingsignificance: even when, while one of the tests is being performedwithout any attention being paid, the other test is performed, both ofthem are performed and displayed as a pair, thus the opportunities ofchecking whether they are normally performed are increased and attentionis called so that one of the tests is prevented from being badlytreated. Although steps S128 and S130 are related to the detectionfunction of a manual operation, step S132 may be additionally performedevery predetermined period (for example, once every year), and signalsof the tests may be transmitted. In this case, the results of the testsare also displayed side by side in step 134, and thus attention iscalled to the necessity of the tests as a pair. The failure of the powersource unit 16 of the LED lighting apparatuses 4 and 6 can cause a fire,and the fire alarm apparatus 8 is related to the notification of thefire, which is an unlikely event, with the result that the cooperationof the tests is significant.

In step S136, whether or not “fire alarm apparatus power supply failure”is received from the LED lighting apparatuses 4 and 6 is checked. Then,if it is received, the process moves to step S138 where the informationindicating “fire alarm apparatus power supply failure” is displayed, andthe process moves to step S140. On the other hand, if, in step S136, thereception of the signal is not detected, the process directly moves tostep S140. In step S140, whether or not the operation of a predeterminedperiod or the reception of the signal is not continuously performed ischecked, and, if so, the flow is completed. On the other hand, if anyoperation within the predetermined period or the reception of the signalis performed, the process returns to step S112. Thereafter, unless theoperation of the predetermined period or the reception of the signal isnot performed, steps S112 to S140 are repeated.

Various features of the present invention are not limited to the firstembodiment described above; other embodiments utilizing the advantagesare possible. For example, although, in the first embodiment describedabove, the white LED group 14 is not turned on or the white LED group 14being kept on is turned off so that a notification indicating that thelife of the white LED group 14 or the electrolytic capacitor 60 ends isprovided, instead, when the life of the white LED group 14 or theelectrolytic capacitor 60 ends, a notification may be provided such asby the blinking of the white LED group 14, that is, unusual lighting.For example, the period of the blinking of the unusual lighting ischanged depending on whether the life of the white LED group 14 ends orthe life of the electrolytic capacitor 60 ends, and thus it is possibleto provide a notification so as to identify the two cases. Furthermore,the unusual lighting of the white LED group 14 performed when a failureoccurs in the life detection function is made to differ from the unusuallighting performed when the life of the white LED group 14 or theelectrolytic capacitor 60 ends, and thus it is possible to provide anotification so as to identify the functional failure.

Even in the case where, instead of the detection of the life of LEDsthrough accumulative counting in the state in which energy is suppliedto the white LED group 14 as in the first embodiment, a light receivingunit for actually monitoring the state of light emission of the whiteLED group 14 is provided, and, based on a relationship between thesupply of energy to the white LED group 14 and light emission from thewhite LED group 14, the life of LEDs is detected, various features afterthe detection of the life of LEDs of the present invention can beapplied. Furthermore, various features of the present invention relatedto the life of the electrolytic capacitor can be applied to lightingapparatuses other than the LED lighting apparatus such as a fluorescentlamp lighting apparatus.

Although, in the first embodiment, as shown in FIG. 4, exchange ofinformation with other LED lighting apparatuses prevents a plurality ofLED lighting apparatuses from being simultaneously turned off within thesame room due to the end of the life of LEDs, the prevention of thesimultaneous turning off resulting from the end of the life of LEDs isnot limited to the means described above. For example, the nonvolatilecounter 72 shown in FIG. 2 is set such that, when, at the time when thelighting time period of the white LED group 14 is assumed to reach40,000 hours (brightness of light emitted by the same input is reducedto 70% of that of a new one), the number of corresponding pulses iscounted, the overflow pulse is generated. Here, an additional count timecomponent is provided in the nonvolatile counter 72, and the LEDlighting apparatuses are shipped with settings being made such that theadditional count times of the LED lighting apparatuses randomly varywithin about plus or minus 100 hours. Thus, even if a plurality of LEDlighting apparatuses within the same room are turned on under the sameconditions for the same number of hours, their lives are not determinedto end at the same time period, and the LED lighting apparatuses areturned off with the variations described above. In this way, it ispossible to prevent a plurality of LED lighting apparatuses within thesame room from being turned off at the same time period due to the endof the life of LEDs, and consequently, a sufficient time period forreplacing the LED lighting apparatus that is first turned off is givenand then the subsequent LED lighting apparatus is turned off.

Second Embodiment

FIG. 8 is a block diagram showing the detailed configuration of an LEDlighting apparatus of a second embodiment of the LED lighting systemaccording to the embodiments of the present invention. Since the entiresystem is basically the same as in the first embodiment, FIG. 1 is alsoused. In FIG. 8, the same parts as in FIG. 2 are identified with commonreference numerals, and their descriptions will not be repeated unlessnecessary.

The first point of the second embodiment of corresponding FIG. 8 whichis different from the first embodiment is that the white LED group isreplaced by a division white LED group 114, and thus a switch elementgroup 164 and a constant current source group 166 can independentlyperform light intensity adjustment on each division part. In this way,the white LED group 114 can turn on part thereof and turn off the otherparts or turn on parts with a gradation. Hence, when the division whiteLED groups of a plurality of LED lighting apparatuses are seamlesslyarranged in line, the boundary between a turn-on part and a turn-offpart can be formed halfway through the LED lighting apparatus instead ofbeing formed between the LED lighting apparatuses, and a gradualgradation can be produced over a plurality of LED lighting apparatusesarranged in line. Since the division parts of the division white LEDgroup 114 are independently turned on and off or turned on withdifferent levels of brightness, based on a plurality of duty cyclesignals output from the duty control unit 70 based on an instructionfrom an illumination control unit 120, the PWM control unit 68independently controls corresponding switch elements in the switchelement group 164. These are disclosed in Japanese Patent ApplicationNos. 2009-127206 and 2009-147167 filed by the same applicant. A varietyof lighting functions of the division white LED group 114 as describedabove supply various types of illumination at the time of normalillumination, and are also utilized for providing a unique notificationwhen the life of the LED lighting apparatus 4 ends. The details thereofwill be described later.

In the second embodiment, an all-night light control unit 102 that iscontrolled by the illumination control unit 120 and a yellow LED 104that is turned on and off by this are provided. The all-night lightcontrol unit 102 turns on, according to the operation of the remotecontroller 10, the yellow LED 104, as an all-night light, with a smallamount of power, instead of the division white LED group 114 that isturned off at the time of, for example, bedtime. The all-night lightcontrol unit 102 and the yellow LED 104 are utilized, as describedabove, as an all-night light at the time of normal use, and are alsoutilized when a unique notification is provided at the time of the endof the life of the LED lighting apparatus 4. The details thereof will bedescribed later. In the second embodiment, as shown in FIG. 8, thetransformer 56 of FIG. 1 is omitted, and the full-wave rectifier 58 ispowered directly from the electrical power line 12; whether thetransformer 56 is present or not does not particularly come from thedifference between the first embodiment and the second embodiment.

FIG. 9 is a flowchart showing the basic function of the illuminationcontrol unit 120 of the second embodiment shown in FIGS. 1 and 8. Sincemost of the details thereof are the same as the flow of FIG. 3 in thefirst embodiment, corresponding steps are identified with common stepnumbers, and their description will not be repeated. The flow of FIG. 9differs from that of FIG. 3 in steps indicated by thick lines in FIG. 9in which a notification is provided such as when the life of the LEDlighting apparatus 4 ends. Specifically, as shown in FIG. 9, if, in stepS6, the life of the electrolytic capacitor 60 is determined to end, theprocess moves to step S144 where processing for providing a notificationindicating the end of the life or the like is performed. In step S146,information indicating that “life ends” is transmitted to the remotecontroller 10, and the flow is completed. In step S20, a determinationsignal indicating that the life of the LED lighting apparatus 4 ends isdetected, and thus, if, in step S24, the mode is the instant turn-offmode, the process moves to step S142 where an instruction signal of aguidance display saying that relighting can be performed by conductingthe turn-on operation is transmitted to the remote controller 10, andthe process moves to step S144. The details of notification processingin step S144 will be described later.

FIG. 10 is a flowchart showing the details of step S144 in the secondembodiment shown in FIG. 9. When the flow starts, in step S152, whetheror not a setting for utilizing the yellow (all-night light) LED 104 toprovide a notification of the end of the life is made is checked. If thecorresponding setting is made, the process proceeds to step S154 wherethe yellow LED 104, which is the all-night light, is turned on and theprocess moves to step S156 where whether or not the first setting ismade is checked. Then, if the first setting is made, the processproceeds to step S158 where the division white LED group 114 is normallyturned on, and the process proceeds to step S160. As described above, inthe first setting, the notification of the end of the life of thedivision white LED group 114 is performed by turning on the yellow LED104 without the lighting state itself of the division white LED group114 being changed. Since, in general, the yellow LED 104 and thedivision white LED group 114 are not simultaneously turned on, this isrecognized to be the notification of the end of the life. On the otherhand, if, in step S156, the setting is not the first setting, theprocess directly moves to step S160. If, in step S152, the setting isnot an all-night light setting, the process also directly moves to stepS160.

Whether or not the first setting described above is performed may bepreviously set as the specification of its product when the LED lightingapparatus 4 is shipped or may be set when a user installs the LEDlighting apparatus 4. The same is true for the second to sixth settings,which will be described later. The first to sixth settings cannot be setsimultaneously; any one of them is selected and set. By contrast,whether or not an all-night light notification setting is made canfreely be set in combination with any of the second to sixth settings.As is obvious from the flow from step S152 to step S158, the normallighting of the division white LED group 114 based on the first settingcan only be combined with a case where the all-light night notificationis provided.

In step S160, whether or not the second setting is made is checked. Ifthe setting is the second setting, the process proceeds to step S162where the lighting of the division white LED group 114 is disabled or ifit is kept on, this is turned off and the process moves to step S164. Onthe other hand, if, in step S160, the setting is not the second setting,the process directly moves to step S164. As described above, the secondsetting can be combined with each of the case where the all-night lightnotification setting is made and the case where the all-night lightnotification setting is not made; if the process moves to step S162without the all-night light notification setting being made, thenotification of the end of the life is provided as in the firstembodiment.

In step S164, whether or not the third setting is made is checked. Ifthe setting is the third setting, the process proceeds to step S166where the turn-on duty cycle of the division white LED group 114 islowered (for example, to one-fourth of a normal one) and thus thedivision white LED group 114 is turned on with reduced brightness, andthe process moves to step S168. On the other hand, if, in step S164, thesetting is not the third setting, the process directly moves to stepS168. As described above, the third setting can be combined with each ofthe case where the all-night light notification setting is made and thecase where the all-night light notification setting is not made.

In step S168, whether or not the fourth setting is made is checked. Ifthe setting is the fourth setting, the process proceeds to step S170where part of the division white LED group 114 is turned on and theother parts are turned off, that is, partial lighting control isperformed, and the process moves to step S172. In this case, in thepartial lighting, unlike one-side lighting typical of normal lightingcontrol, for example, division parts are turned on in a staggeredmanner, that is, partial lighting unique to the end of the life isperformed. On the other hand, if, in step S168, the setting is not thefourth setting, the process directly moves to step S172. As describedabove, the fourth setting can be combined with each of the case wherethe all-night light notification setting is made and the case where theall-night light notification setting is not made.

In step S172, whether or not the fifth setting is made is checked. Ifthe setting is the fifth setting, the process proceeds to step S174where processing for providing an instruction to blink the divisionwhite LED group 114 is performed, and the process moves to step S176. Onthe other hand, if, in step S172, the setting is not the fifth setting,the process directly moves to step S176. As described above, the fifthsetting can be combined with each of the case where the all-night lightnotification setting is made and the case where the all-night lightnotification setting is not made.

In step S176, whether or not the sixth setting is made is checked. Ifthe setting is the sixth setting, the process proceeds to step S178where processing for providing an instruction to make the brightness ofthe division white LED group 114 smoothly pulsate and change throughchange of duty is performed, and the flow is completed. On the otherhand, if, in step S176, the setting is not the sixth setting, the flowis directly completed. As described above, the fifth setting can becombined with each of the case where the all-night light notificationsetting is made and the case where the all-night light notificationsetting is not made.

As a variation of the second embodiment described above, the yellow LED104 of FIG. 8 may be changed to a red LED, and, instead of the all-nightlight, a special display unit for producing a display saying that thelife ends may be provided. In this case, the all-night light controlunit 102 is replaced by a life end notification controller unit.Moreover, in this case, the “all-night light” in steps S152 and S154 ofFIG. 10 is replaced by the “red LED.” Moreover, step S152 may beomitted, and, in any of the first to sixth settings, the red LEDdesigned for the notification of the end of the life may be configuredto be turned on.

Third Embodiment

FIG. 11 is a block diagram showing a third embodiment of an LED lightingsystem according to the embodiments of the present invention. In thethird embodiment of FIG. 11, the same parts as in the first embodimentof FIG. 1 are identified with common reference numerals, and theirdescriptions will not be repeated unless necessary. In the thirdembodiment of FIG. 11, the LED lighting apparatus and the fire alarmapparatus are formed integrally as a fire alarm apparatus-integral LEDlighting apparatus 204; it communicates with the remote controller 10through a common wireless communication unit 224 by infrared light 248.As with the power source unit 16 of FIG. 1, an illumination power sourceunit 216 is powered from the electrical power line 12 whereas a firealarm apparatus power source unit 230 is powered by a button battery203.

In the third embodiment of FIG. 11, the LED life determination unit andthe electrolytic capacitor life determination unit are further omitted,and, instead of them, a battery detection unit 205 for detecting thevoltage of the button battery 203 is provided. Since the life of thebutton battery 203 that is of about ten years is the same as the livesof the electrolytic capacitor of the illumination power source unit 216and of the white LED group 14, if the voltage of the button battery 203is checked and then is detected to be lowered to a predetermined voltageor less, the entire life of the fire alarm apparatus-integral LEDlighting apparatus 204 is determined to end. The battery detection unit205 is started along with the turn-on operation and the light intensityadjustment operation of the white LED group 14, and thus the detectionof the life of the fire alarm apparatus-integral LED lighting apparatus204 and the daily check of the function of the fire alarm apparatus areperformed, with the result that an failure to perform the operation whenit needs to be performed is prevented. An alarm control unit 232cooperates to perform the above function under the control of anillumination control unit 220.

FIG. 12 is a flowchart showing the function of the illumination controlunit 220 shown in FIG. 11. As in the first embodiment, the flow startsby receiving the turn-on signal from the remote controller 10. When theflow starts, in step S182, the power supply voltage of the buttonbattery 203 is checked by the battery detection unit 205 through thealarm control unit 232. Then, in step S184, whether or not the life ofthe button battery 203 ends is determined, and if the life ends, in stepS186, a signal indicting that the power supply battery of the fire alarmapparatus runs out is transmitted to the remote controller 10.

Then, in step S188, whether or not the turn-on signal that makes theflow of FIG. 12 start is a turn-on signal of an operation that isperformed within a predetermined period of time (for example, 30seconds) after the white LED group 14 is turned off due to the end ofthe life of the button battery 203 is checked. This is because, when thewhite LED group 14 being kept on in the instant turn-off mode describedlater is suddenly turned off due to the end of the life of the buttonbattery 203, relighting is conducted by performing the turn-on operationwithin a predetermined period of time.

If the operation is not the operation corresponding to step S188, theprocess proceeds to step S190 where whether or not the turn-on signalthat makes the flow of FIG. 12 start is received within a predeterminedperiod of time (for example, 1 second) after the preceding operation ischecked. This is performed so that, even if the life of the buttonbattery 203 is determined to end and the fire alarm apparatus-integralLED lighting apparatus 204 is not turned on by a normal turn-onoperation, lighting can be carried out by performing a specialoperation, that is, continuously performing an operation at theintervals of one second or less. If the operation is the operationcorresponding to step S190, the process proceeds to step S192 where,after the life of the button battery 203 is determined to end, whetheror not the operation is an operation of a predetermined number of times(for example, five times) or less is checked. This is performed so that,for ease of use, even if the life of the button battery 203 ends,lighting performed by the special operation that is the continuousoperation is allowed but a predetermined limit is placed on the numberof times and the turn-on operation is prevented from being continued fora long time even though the life of the white LED group 14 is assumed toend due to the end of the life of the button battery 203.

If, in step S192, the operation is the operation of the predeterminednumber of times or less, the process proceeds to step S194 where thenumber of times of reception of an operation signal is incremented onetime and the process proceeds to step S196 where the white LED group 14is turned on. On the other hand, if, in step S184, the life of thebutton battery 203 is not determined to end, the process directly movesto step S196 where the white LED group 14 is immediately turned on. If,in step S188, the white LED group 14 is recognized to be the turn-onsignal of the predetermined period of time or less after the white LEDgroup 14 is turned off due to the end of the life of the button battery203, the process also directly proceeds to step S196 where the white LEDgroup 14 is turned on.

If, in step S196, the white LED group 14 is turned on, the processproceeds to step S198 where whether or not a manual light intensityadjustment signal is received from the remote controller 10 is checked.If it is received, the process proceeds to step S200 where the powersupply voltage of the button battery 203 is checked. Then, in step S202,whether or not the life of the button battery 203 ends is determined,and, if the life ends, in step S204, a signal indicating the powersupply battery of the fire alarm apparatus runs out is transmitted tothe remote controller 10. In this way, the button battery 203 is checkednot only at the time of the turn-on operation but also at the time ofthe light intensity adjustment operation. Furthermore, in step S206, atthe moment when a determination signal indicating that the life of thebutton battery 203 ends is generated, whether or not the mode is set ata mode for turning off the white LED group 14 is checked. If the mode isnot the instant turn-off mode, the white LED group 14 is not turned off,and the process proceeds to step S208. On the other hand, if, in stepS202, the signal indicating that the life of the button battery 203 endsis not generated, the process directly moves to step S208.

In step S208, a new duty cycle signal based on the manual lightintensity adjustment signal detected in step S198 is output, and theprocess moves to step S210. On the other hand, if, in step S198, themanual light intensity adjustment signal is not detected, the processdirectly moves to step S210. In step S210, whether or not the turn-offsignal is received from the remote controller 10 is checked. If theturn-off signal is not received, the process returns to step S198, andthereafter, unless the turn-off signal is received and the signalindicating the life of the button battery 203 ends is generated in theinstant turn-off mode, steps S198 to S210 are repeated to correspond tothe light intensity adjustment control or the variation of the state ofthe life of the button battery 203. On the other hand, if, in step S210,the turn-off signal is recognized to be received, the flow is completed.

When the life of the button battery 203 ends, if, in step S190, it isnot detected that the signal is the turn-on signal within apredetermined period of time after the preceding operation, the processproceeds to step S212 where an instruction signal of a guidance displaysaying that continuous operation allows lighting to be performed up to apredetermined number of times is transmitted to the remote controller10, and the process moves to step S214. On the other hand, if, in stepS192, it is detected that lighting is carried out by performingcontinuous operation a predetermined number of times or more, theprocess immediately moves to step S214. In both cases, the lightingcorresponding to the turn-on operation is not performed, and, in stepS214, information indicating “non-lighting” is transmitted to the remotecontroller 10 and the flow is completed. If, in step S206, the mode isthe instant turn-off mode, the process moves to step S216 where thewhite LED group 14 is instantly turned off, and, in step S218, aninstruction signal of a guidance display saying that relighting isallowed by performing the turn-on operation within a predeterminedperiod of time is transmitted to the remote controller 10, and,furthermore, in step S214, information indicating “non-lighting” istransmitted to the remote controller 10 and the flow is completed.

In a variation of the third embodiment, when the entire life of the firealarm apparatus-integral LED lighting apparatus 204 is determined, thebutton battery 203 of the alarm apparatus power source unit 230 is notused, a button buttery designed for the determination of the life isfurther added, the voltage of the button battery 203 and the voltage ofthis button buttery designed for the determination of the life arechecked and thus it is possible to determine the entire life of the firealarm apparatus-integral LED lighting apparatus 204. When this type ofbutton buttery designed for the determination of the life is added, acurrent corresponding to the turn-on current of the white LED group 14is passed through the button buttery designed for the determination ofthe life, and thus the button buttery designed for the determination ofthe life corresponding to the degradation of the white LED group 14 maybe consumed.

Furthermore, in FIG. 11, in the LED lighting apparatus 6, the LED lifedetermination unit and the electrolytic capacitor life determinationunit are also omitted, and the life of the LED lighting apparatus 6 maybe determined by the consumption of the button buttery designed for thedetermination of the life. In this case, even if a plurality of LEDlighting apparatuses within the same room are turned on under the sameconditions for the same number of hours, with the variation of the lifeof the button battery, it is possible to prevent a plurality of LEDlighting apparatuses within the same room from being turned off at thesame time period due to the end of the life of LEDs, and consequently, asufficient time period for replacing the LED lighting apparatus that isfirst turned off is given and then the subsequent LED lighting apparatusis turned off.

Fourth Embodiment

FIG. 13 is a block diagram showing a fourth embodiment of an LEDlighting system according to the embodiments of the present invention.Since the fourth embodiment has the same parts as the first embodiment,in FIG. 13, the same parts as in the first embodiment of FIG. 1 areidentified with common reference numerals, and their descriptions willnot be repeated unless necessary. The feature of the fourth embodimentof FIG. 13 is that a smart meter 311 which manages domestic powerconsumption and a smart grid server 313 which cooperates with the smartmeter 311 by line communication are added. Although, in FIG. 13, forease of illustration, only the LED lighting apparatus 4 is shown, andthe LED lighting apparatus 6 and the like of FIG. 1 are omitted, the LEDlighting system is the system that is similar to that of FIG. 1 and thatincludes a plurality of LED lighting apparatuses without any change.

In the fourth embodiment, the LED lighting apparatus 4 transmitsinformation (corresponding to the amount of current supplied to thewhite LED group 14 through PWM control) on power consumed by the LEDlighting apparatus 4 from the wireless communication unit 24 (forexample, an infrared communication unit) to the outside. The smart meter311 has a power source unit 315 that is powered from the electricalpower line 12. A meter control unit 317 is powered from the power sourceunit 315, and is operated by a microcomputer that is operated by areference clock and a predetermined program. The information on powerconsumed by the LED lighting apparatus 4 that is transmitted from thewireless communication unit 24 is received by a wireless communicationunit 319 and is processed by a consumption power management unit 321based on control by the meter control unit 317. The result of theprocessing is displayed, as a power consumption amount, on a meterdisplay unit 323 for each of devices under management by the smart meter311, and is transmitted by a line communication unit 325 through acommunication line to the smart grid server 313.

The power consumption amount information transmitted from the smartmeter 311 is received by a line communication unit 327 of the smart gridserver 313, and is stored in a storage unit 331 by control by a servercontrol unit 329. The smart grid server 313 (server control unit 329)communicates, as necessary, with the meter control unit 317, performscharge settlement processing for power used and performs deduction froma registered bank or the like.

Furthermore, in the smart meter 311, a life management unit 333performs, based on control by the meter control unit 317, accumulativeprocessing on the consumption power information of the LED lightingapparatus 4 received by the wireless communication unit 319. Then, when,based on the accumulative consumption power, the life management unit333 determines that the life of the LED lighting apparatus 4 ends, it isdisplayed on the meter display unit 323, is transmitted to the wirelesscommunication unit 46 of the remote controller 10 by infrared rays 335through infrared communication and the end of life is displayed on thedisplay unit 52. In addition to the life determination by the smartmeter 311 as described above, the LED lighting apparatus 4 of the fourthembodiment of FIG. 13 can check the life two or three times since it hasthe LED life determination unit 26 and the electrolytic capacitor lifedetermination unit 28 that are the same as in the first embodiment ofFIG. 1. However, since, in the fourth embodiment, the smart meter 311has the life determination function based on the accumulativeconsumption power, the LED lighting apparatus 4 itself can alsocorrespond to the life determination of a simple LED lighting apparatusthat does not include the LED life determination unit 26 and theelectrolytic capacitor life determination unit 28.

When the smart meter 311 receives the power consumption amountinformation from a device that transfers life determination to the smartgrid server 313, it is transmitted to the smart grid server 313 throughline communication. The power consumption amount information received bythe smart grid server 313 is accumulatively stored in the storage unit331, and the server control unit 329 determines whether or not the lifeends. Then, when, based on the accumulative consumption power that isstored and updated, the life of the device is determined to end, theserver control unit 329 transmits information on the determination tothe smart meter 311. The smart meter 311 transmits the receiveddetermination information on the end of life to the remote controller(for example, when the device is assumed to be the LED lightingapparatus 4, the remote controller 10) of the device by the infraredrays 335, and is displayed on the remote control display unit 52. Bycommunication through the remote controller 10 or directly from thewireless communication unit 319 to the wireless communication unit 24,the information on the end of the life is transmitted, and anappropriate action such as for turning off the LED lighting apparatus 4is taken.

Although, in the above description, the LED lighting apparatus 4, thesmart meter 311 and the remote controller 10 communicate with each otherby infrared wireless communication, this can be achieved by near fieldwireless communication through radio waves or by power linecommunication through the electrical power line 12.

FIG. 14 is a flowchart showing the basic function of the meter controlunit 317 shown in FIG. 13. The flow starts by the application ofelectricity to the smart meter 311. First, in step S222, a registereddevice under management by the smart meter 311 is checked. Then, basedon this, in step S224, whether or not the addition of a new device tothe system is recognized is checked. Moreover, whether or not there is adevice that has been registered but has not been recognized is checked.If the corresponding device is present, the process proceeds to stepS226 where the meter registration of the new device and deregistrationprocessing on the unrecognized device are performed, and the processmoves to step S228.

In step S228, use related date information and use history informationare acquired from the newly registered device. These types ofinformation are important especially when the device is a used device;these types of information are acquired from the storage unit of thedevice. When information indicating that the device is new is acquired,the time when recognition is made in step S224 is assumed to be a datewhen the use is started. In the deregistered device, the date detectedin step S224 is assumed to be a date when the use is completed. Actualuse result information such as past accumulative consumption powerinformation in the used device applies for the use history information.

If the processing for acquiring the use related date information and theuse history information is completed in step S228, the flow proceeds tostep S230 where whether or not the user approves the management of thedevice through the smart grid server 313 is checked, and then, if theapproval is received, in step S232, communication with the smart gridserver 313 is performed, server registration and deregisteringprocessing are performed and the process moves to step S234. On theother hand, if, in step S230, server management approval is notrecognized, the process directly moves to step S234. As described above,in consideration of privacy, when the user does not desire, detailedinformation on each device is stored in the smart meter 311, andinformation other than a total power use amount necessary for chargesettlement is prevented from leaking to the outside. If, in step S224,neither the recognition of a new device nor the detection of anunrecognized but registered device is performed, the process directlymoves to step S234.

If, in the server registration/deregistration processing performed instep S232, information indicating deregistration is transmitted to thesmart grid server 313, information on the type of device to be newlybought and the related type of device is transmitted back from the smartgrid server 313 accordingly. As described above, the smart grid server313 grasps, based on the approval of the user, the stop of the use ofthe device and scrap information, and can use them as analysis data forthe actual use result information about the sold product and asinformation for introducing a new product. The same information on thetype of device to be newly bought is received from the smart grid server313 when the smart grid server 313 grasps information indicating thatthe life of the device ends; this will be described later.

In step S234, whether or not information on power used is newly receivedfrom a registered device under management is checked. This informationon power used is transmitted from each device every predetermined periodof time or each time a predetermined amount of power is used. If theinformation on power used is received, the process proceeds to step S236where power used is accumulatively summed for each device, and a displayof power used on the meter display unit 323 is updated. Then, in stepS238, whether or not the device is a device that transfers lifedetermination to the smart grid server 313 is checked, and, if not, theprocess moves to step S240 so that a determination is made within thesmart meter 311.

In step S240, whether or not an accumulative value of the power usedthat is updated in step S236 corresponds to a life value is checked,and, if so, in step S242, a signal indicating “the end of life” istransmitted to the remote controller of the device, and the processmoves to step S244. In step S244, communication processing on lifemanagement with the smart grid server 313 is performed in apredetermined procedure, and the details thereof will be describedlater. Then, in step S246, communication processing for the settlementof a charge of the power used with the smart grid server 313 isperformed. The details of this processing include checking whether ornot a regular settlement date such as once every month is reached, and acharge settlement procedure for performing deduction from a bankaccount. if the date is reached.

On the other hand, if, in step S234, the information on the power usedis not detected to be newly received, the process moves to step S248where whether or not information indicating “the end of life” isreceived from the registered device is checked. For example, thiscorresponds to the determination information by the LED lifedetermination unit 26 or the electrolytic capacitor life determinationunit 28 of the LED lighting apparatus 4. If these types of informationare received, the process moves to the life management servercommunication processing in step S244, and the processing describedabove is performed. On the other hand, if, in step S248, the receptionof the information indicating “the end of life” is not detected, theprocess moves to the charge settlement server communication processingin step S246, and the processing described above is performed. If, instep S238, the device is detected to be the device that transfers lifedetermination to the smart grid server 313, the process moves to stepS250 where new accumulative power information in step S236 istransmitted to the smart grid server 313, and the process moves to thelife management server communication processing.

If, in step S246, the charge settlement server communication processingis completed, the flow moves to step S252 where whether or not anoperation for stopping the smart meter 311 to perform maintenance isperformed is checked. If the operation is not detected, the processreturns to step S224. Thereafter, unless the maintenance stop operationis not detected, steps S224 to S252 are repeated. On the other hand, if,in step S252, the stop of the maintenance is detected, the flow iscompleted.

FIG. 15 is a flowchart showing the details of the life management servercommunication processing performed in step S244 in the flow of FIG. 14.When the flow starts, in step S262, whether or not the type of device isthe type of device that transfers life determination is checked, and, ifso, in step S264, whether or not a determination of whether the lifeends is received is checked. If the reception is not performed, the flowis immediately completed. On the other hand, if the determination ofwhether the life ends is received, the process moves to step S266. If,in step S262, the type of device is not the type of device thattransfers determination, based on the information indicating the end ofthe life grasped within the smart meter 311, this means the start of theflow of FIG. 15, and the process directly moves to step S266.

In step S266, whether or not the user agrees with management by thesmart grid server 313 is determined, and, if the determination cannot beperformed, the flow is immediately completed. In this case.communication with the smart grid server 313 is not performed. On theother hand, if, in step S266, the user is determined to agree with theserver management, in step S268, the information indicating “the end ofthe life” of the device is transmitted to the smart grid server 313where the process moves to step S270.

In step S270, whether or not life distribution information is receivedfrom the smart grid server 313 is checked. This information isinformation that indicates distribution obtained by performingstatistical processing on life information collected in the smart gridserver 313 managing a large number of devices and in which position theown device is located therein. If this type of information is received,the process proceeds to step S272 where distribution information withinthe identical device (the device of the same type number made by thesame maker) is transferred to the remote controller 10 in charge of thedevice. In step S274, distribution information within the same type ofdevice (the same type of device including those of other makers) as thedevice is transferred, and the process moves to step S276.

In step S276, in the information in steps S272 and S274, whether or notthe life of the own device is significantly and abnormally short ischecked, and, if so, power use advice information based on this isreceived in step S278, this is transferred to a remote controller (forexample, the remote controller 10) in charge of the device in step S280and the process moves to step S282. This advice is a piece of advicethat is suitable for each device and that prevents the status of usewhich can cause the life to become short. If the user checks this adviceand does not agree with it, the user can make an inquiry based on theinformation received in steps S272 and S274. If, in step S270, the lifedistribution information is not received or in step S276, the life endabnormality does not apply, the process moves to step S282 at the pointin either case.

In step S282, whether or not the information on the type of device to benewly bought is received is checked, and, if it is received, in stepS284, this is transferred to a remote controller (for example, theremote controller 10) in charge of the device, and the flow iscompleted. The information on the type of device to be newly bought maybe collected by the smart grid server 313 itself or may be accessinformation to a special site that collects information on the same typeof device of each maker and the related type of device and that comparestheir specifications and prices.

The technical features disclosed in the present specification will besummarized below.

<First Technical Feature>

A first technical feature disclosed in the present specification relatesto an lighting apparatus. An object of the first technical feature is toprovide an lighting apparatus that can appropriately perform lifemanagement.

To achieve the object, the first technical feature disclosed in thepresent specification is to provide a lighting apparatus including: alight source unit; a power source unit that supplies power to the lightsource unit; a power source unit ability detection unit; and a powersource unit life determination unit that determines the life of thepower source unit based on the detection by the power source unitability detection unit. Thus, it is possible to safely use a lightingapparatus that can be used for a long period of time.

In the specific feature, the power source unit receives electric powerfrom an alternating-current power line and includes a rectifier unit andan electrolytic capacitor that smoothes an output from the rectifierunit, and the power source unit ability detection unit detects thedeterioration of the smoothing ability of the electrolytic capacitor.Thus, it is possible to appropriately manage the life of theelectrolytic capacitor, which is particularly problematic in the powersource unit.

In another specific feature, the lighting apparatus includes anotification unit that provides a notification of the determinationresult of the power source life determination unit to the outside. Thus,it is possible to varyingly and appropriately manage the lifedetermination result. In another specific feature, the lightingapparatus includes a controller unit that provides a notification of thedetermination result by controlling the light source unit based on thedetermination result of the power source life determination unit. Thus,it is possible to intuitively recognize the end of the life of thelighting apparatus. In s more specific feature, based on thedetermination result, the controller unit disables the light source unitfrom emitting light or stops the light emission by the light sourceunit.

The first technical feature described above is suitable when the lightsource unit is an LED light source unit. The LED light source unit has alonger life than that of a fluorescent lamp or the like and can be usedlonger than the life of the power source unit when the age deteriorationof its brightness is not important; the lighting apparatus can be usedwithout the end of the life being realized. The first technical featuredescribed above is significant in safely using such a lighting apparatusthat can be used for a long period of time. In a more specific feature,the lighting apparatus includes an LED life determination unit thatdetermines the life of the LED light source unit; this prevents a healthdisadvantage or the like caused by continuously using the lightingapparatus without a reduction in the brightness of the LED light sourceunit due to age deterioration being realized.

Another feature is to provide a lighting apparatus including: an LEDlighting source unit; a power source unit that supplies power to the LEDlight source unit; and an LED life determination unit that determinesthe life of LEDs by summing the amount of energy input from the powersource unit into the LED light source unit. Thus, it is possible toprevent a health disadvantage or the like caused by continuously usingthe lighting apparatus without a reduction in the brightness of the LEDlight source unit due to age deterioration being realized.

In a specific feature, the LED life determination unit includes anonvolatile counter that sums the amount of energy input from the powersource unit into the LED light source unit. Thus, it is possible tocount the life by appropriately summing the actual use result even ifpower supply is temporarily stopped due to a power failure, the transferof the lighting apparatus or the like.

In another specific feature, the lighting apparatus includes: acontroller unit that controls light emission by the LED light sourceunit; and a reference clock unit that provides a reference clock to thecontroller unit, in which the LED life determination unit sums theamount of energy input into the LED light source unit. based on thereference clock. Thus, it is possible to appropriately count the lifewith a simple configuration. In a more specific feature, the LED lifedetermination unit includes a counter that counts pulses based on thereference clock while the energy is being input into the LED lightsource unit.

In a further specific feature, the LED life determination unit adjuststhe pulse count based on the reference clock according to the amount ofenergy input into the LED light source unit per unit time. In anotherspecific feature, the lighting apparatus includes temperaturemeasurement means for measuring the temperature of the LED light sourceunit, in which the LED life determination unit adjusts the pulse countbased on the reference clock according to the temperature measurementmeans. Thus, it is possible to count the life close to the actual resultof age deterioration of the LED light source unit.

Another feature is to provide a lighting apparatus including: an LEDlight source unit; a power source unit that supplies power to the LEDlight source unit; an LED life determination unit that determines thelife of the LED light source unit; and a power source unit lifedetermination unit that determines the life of the power source unit.Thus, it is possible to appropriately manage the long lives of the LEDlight source unit and the power source unit.

As described above, according to the first technical feature disclosedin the present specification, there is provided a lighting apparatusthat can appropriately perform life management,

<Second Technical Feature>

A second technical feature disclosed in the present specificationrelates to an lighting apparatus. An object of the second technicalfeature is to provide an lighting apparatus that can appropriate lifemanagement.

To achieve the object, the second technical feature disclosed in thepresent specification is to provide a lighting apparatus including: anLED light source unit; a power source unit that supplies power to theLED light source unit; an LED life determination unit that determinesthe life of the LED light source unit; and a notification controllerunit that controls light emission by the LED light source unit based onthe determination by the LED life determination unit and that provides anotification of the life of the LED light source unit. Thus, it ispossible to intuitively provide a notification of the life with the LEDlight source unit itself whose life is to be determined.

Another feature is to provide a lighting apparatus including: an LEDlight source unit; a power source unit that supplies power to the LEDlight source unit; a power sour unit life determination unit thatdetermines the life of the power source unit; and a notificationcontroller unit that controls light emission by the LED light sourceunit based on the determination of the power source life determinationunit and that provides a notification of the life of the power sourceunit. Thus, it is possible to intuitively provide, with the LED lightsource unit itself, a notification of the life of the power source unit,which may be dangerous if continuously used after the end of the life.

In a specific feature, when the notification controller unit providesnotifications of life based on the determination by the LED lifedetermination unit and the determination by the power source unit lifedetermination unit, a difference between the notifications of life basedon the determinations by the both is made. Thus, it is possible toappropriately provide both a notification of the life of the LED lightsource unit, which is not urgently dangerous if continuously used and anotification of the life of the power source unit, which may bedangerous.

In another specific feature, the notification controller unit provides anotification of life by failing to turn on the LED light source unit,blinking the LED light source unit, pulsating and turning on the LEDlight source unit, reducing light emitted by the LED light source unitor partially turning on the LED light source unit. Thus, it is possibleto appropriately provide a notification that the lighting apparatus isdifferent in lighting from that at the time of normal lighting. Thenotification methods described above may be previously selectable. Inanother specific feature, the notification controller unit provides anotification either when an instruction to turn on the LED light sourceunit is provided or when the life determination is performed. Thus, itis possible to provide a notification with timing that allows the userto notice it.

Another feature is to provide a lighting apparatus including: an LEDlight source unit; a power source unit that supplies power to the LEDlight source unit; a plurality of life determination units thatdetermine the lives of a plurality of lighting functions; and anotification controller unit that controls light emission by the LEDlight source unit in a method corresponding to the determination resultof each of the life determination units and that provides a notificationof the life of the lighting function. Thus, it is possible to provide anotification of life corresponding to the characteristics of a pluralityof portions of the lighting apparatus whose life ends. Examples of theplurality of portions are the LED lighting unit and the power sourceunit.

Another feature is to provide a lighting apparatus including: an LEDlight source unit; a power source unit that supplies power to the LEDlight source unit; a life determination unit that determines the life ofa lighting function; a storage unit that stores the determination by thelife determination unit; an instruction unit that provides aninstruction to turn on the LED light source unit; and a notificationcontroller unit that controls light emission by the LED light sourceunit based on memory in the storage unit when the instruction to turn onthe LED light source unit is provided and that provides a notificationof the life of the LED light source unit. Thus, it is possible toprevent the LED light source unit being normally kept on in daily lifefrom being suddenly turned on for the notification of life based on thelife determination result, and to provide a notification of life when aturn-on instruction is provided in the subsequent round.

Another feature is to provide a lighting apparatus including: an LEDlight source unit; a power source unit that supplies power to the LEDlight source unit; a life determination unit that determines the life ofa lighting function; a notification controller unit that controls lightemission by the LED light source unit based on the determination by theLED life determination unit and that provides a notification of the lifeof the LED light source unit; and a restoring controller unit thatcancels the control on the LED light source unit by the notificationcontroller unit and that restores the LED light source unit to a normallight emission state. This allows the user who recognizes thenotification of life to continuous normal lighting for the time beinguntil the replacement of the lighting apparatus.

In a specific feature, in the restoring controller unit, the number oftimes of cancellation of the control on the LED light source unit islimited. This prevents the cancellation operation originally designedfor temporary convenience from being repeated a large number of timesand therefore maintains the significance of the notification of life. Inanother specific feature, in the restoring controller unit, a timeperiod during which the control on the LED light source unit can becancelled is limited. Thus, it is possible to easily restore the LEDlight source unit to a normal light emission state only in apredetermined period of time after the notification of life is provided,with the result that temporary convenience is achieved.

In another specific feature, the life determination unit has a pluralityof life determination units for determining the lives of a plurality oflighting functions, and, in the restoring controller unit, thecancellation of the control on the LED light source unit is limitedaccording to the determination result of each of the plurality of lifedetermination units. The allowance of the cancellation can be variedaccording to the degree of seriousness of the determination of life. Ina further specific feature, the plurality of life determination unitsincludes an LED life determination unit that determines the life of theLED light source unit and a power source unit life determination unitthat determines the life of the power source unit. In a further specificfeature, the restoring controller unit allows the cancellation of thecontrol on the LED light source unit based on the life determinationresult of the LED light source unit because it is not dangerous for timebeing but does not allow the cancellation of the control on the LEDlight source unit based on the life determination result of the powersource unit life determination unit.

As described above, according to the second technical feature disclosedin the present specification, there is provided a lighting apparatusthat can appropriately perform life management,

<Third Technical Feature>

A third technical feature disclosed in the present specification relatesto an electrical device management system. An object of the thirdtechnical feature is to provide an electrical device management systemthat can appropriately perform management.

To achieve the object, the third technical feature disclosed in thepresent specification is to provide an electrical device managementsystem including: a first LED illumination unit; a second LEDillumination unit; and a management unit that performs management suchthat, when the lives of the first LED illumination unit and the secondLED illumination unit end, these units are prevented from simultaneouslyleaving a normal lighting state. Thus, it is possible to avoid adisadvantage to lighting environments resulting from a plurality of LEDillumination units being simultaneously turned off due to the end oftheir lives. The LED illumination unit is gradually decreased inbrightness but is not suddenly turned off at a certain point; thecontinuous use of the LED illumination unit without a decrease inbrightness being noticed causes a problem. The management describedabove is useful when the minimum notification of life is provided whilesimultaneous turning off and the like are being prevented.

A specific feature is that the management unit includes: a lifedetermination unit that determines the life of the first LEDillumination unit; a life notification unit that changes, when the lifedetermination unit determines that the life of the first LEDillumination unit ends, the first LED illumination unit from a normalillumination state to a life notification state so as to provide anotification of the end of the life; and a controller unit that holdsthe notification by the life notification unit when the life of thefirst LED illumination unit is determined to end with the life of thesecond LED illumination unit determined to end. Thus, it is possible toprevent the first LED illumination unit and the second LED illuminationunit from simultaneously leaving a normal lighting state. In a morespecific feature, the life notification unit intuitively provides anotification of life by preventing the first LED illumination unit frombeing turned on in the life notification state.

Another feature is to provide an electrical device management systemincluding: a first LED illumination unit; a second LED illuminationunit; a life determination unit that determines the life of the firstLED illumination unit using a criterion different from that fordetermination of the life of the second LED illumination unit; and alife notification unit that changes, when the life determination unitdetermines that the life of the first LED illumination unit ends, thefirst LED illumination unit from the normal illumination state to thelife notification state so as to provide a notification of the end ofthe life. Thus, when the end of the lives of the first LED illuminationunit and the second LED illumination unit prevents these units fromsimultaneously leaving the normal lighting state.

In a specific feature, the criterion of the life notification unit is soset as to have random variation components, and thus the criterion forthe determination of the life of the first LED illumination unit can bedifferent from that for the determination of the life of the second LEDillumination unit.

In another specific feature, the first LED illumination unit and thesecond LED illumination unit each have a life measuring battery, and thelife notification unit determines the life of the first LED illuminationunit based on the consumption of the battery. In this configuration,with variation components of the life of the battery, the criterion forthe determination of the life of the first LED illumination unit can bedifferent from that for the determination of the life of the second LEDillumination unit. In a further specific feature, the electrical devicemanagement system is provided with a fire alarm apparatus, the lifemeasuring battery included in the first LED illumination unit is alsoused as a power supply for this fire alarm apparatus and the lifemanagement of the first LED illumination unit is suitably made tocooperate with the fire alarm apparatus.

Another feature is to provide an electrical device management systemincluding: an LED illumination unit; a fire alarm apparatus; a lifedetermination unit that determines the life of the LED illuminationunit; and a controller unit that performs a test with the function ofthe life determination unit made to cooperate with the function of thefire alarm apparatus. The life determination function of the LEDillumination unit and the function determination of the fire alarmapparatus, which continue for a long period of time, are made tocooperate with each other, and this suitably prevents the occurrence ofan unpredictable event such as an event in which a necessary functiondoes not work when it is required because a test is ignored. In aspecific feature, when the controller unit receives either of aninstruction to test the function of the life determination unit and aninstruction to test the function of the fire alarm apparatus, thecontroller unit automatically provides an instruction to test thefunction of the other.

Another feature is to provide an electrical device management systemincluding: an illumination unit; a fire alarm apparatus; and acontroller unit that tests the function of the fire alarm apparatus inassociation with the normal turn-on control operation of theillumination unit. Thus, the fire alarm apparatus is tested on a dailybasis, and it is therefore possible to prevent the occurrence of anunpredictable event such as an event in which the fire alarm apparatusdoes not work when it is required. In a specific feature, the electricaldevice management system is provided with a life determination unit thatdetermines the life of the illumination unit, and the controller unittests the function of the life determination unit in association withthe normal turn-on control operation of the illumination unit. Thus, inunits, such as the illumination unit and the power source unit, whoselife needs to be managed for a long period of time, its life managementfunction is tested along with the fire alarm apparatus on a daily basis.

Another feature is to provide an electrical device management systemincluding: an information acquisition unit that acquires consumptionpower information on an electrical device; a meter that measuresconsumption power charge based on the consumption power informationacquired by the information acquisition unit; and a life determinationunit that determines the life of the electrical device based on theconsumption power acquired by the information acquisition unit. Thus,with the measurement of the consumption power charge, it is possible tomanage the life of the electrical device under management by the meter.In a specific feature, the electrical device management system isprovided with a notification unit that provides a notification of thedetermination result of the life determination unit to the electricaldevice.

Another feature is to provide an electrical device management systemincluding: an information acquisition unit that acquires consumptionpower information on an electrical device; a meter that measures aconsumption power charge based on the consumption power informationacquired by the information acquisition unit; a communication unit thattransmits to an outside server the consumption power charge measured bythe meter; and a life information acquisition unit that transmits,through the communication unit, to the outside server, the consumptionpower of each electrical device and that receives life determinationinformation on each electrical device that is returned as a response tothe above transmission. Thus, it is possible not only to make asettlement of an electrical charge but also to entrust, as necessary,the life management of each electrical device.

As described above, according to the third technical feature disclosedin the present specification, there is provided an electrical devicemanagement system that can appropriately perform management,

INDUSTRIAL APPLICABILITY

The present invention can be applied to the life management or the likeof an electrical device such as an LED lighting apparatus or a lightingapparatus including an electrolytic capacitor.

OTHER VARIATIONS

The implementation of various features of the present inventiondescribed above is not limited to the implementation of the embodimentsdescribed above; as long as advantages thereof are utilized, variousother embodiments are possible. For example, although the embodimentsdiscusses the management of the LED lighting apparatus, various featuresof the management of the electrical devices are useful in the managementof other lighting apparatuses or electrical devices other than lightingapparatuses. Therefore, the following claims are intended to include anyvariation of the present invention in a technical scope withoutdeparting from the spirit and technical view of the present invention.

LIST OF REFERENCE NUMERALS

-   -   4 First LED illumination unit    -   6 Second LED illumination unit    -   20 and 120 Management unit    -   26 Life determination unit    -   20 and 120 Life notification unit    -   20 and 120 Control unit    -   203 Battery    -   8 and 204 Fire alarm apparatus    -   311 Meter unit    -   319 Information acquisition unit    -   321 Meter    -   333 Life determination unit    -   319 Notification unit    -   325 Communication unit    -   317 and 325 Life information acquisition unit    -   14 and 114 (LED) light source unit    -   16 Power source unit    -   84 Power source unit ability detection unit    -   16 Power source unit life determination unit    -   58 Rectifier unit    -   60 Electrolytic capacitor    -   24 Notification unit    -   20 Control unit    -   14 LED light source unit    -   26 LED life determination unit    -   72 Nonvolatile counter    -   22 Reference clock unit    -   80 Temperature measurement means    -   26 LED life determination unit    -   20 and 120 Notification controller unit    -   28 Power source unit life determination unit    -   24, 20 and 120 Restoring controller unit    -   20 and 120 Storage unit

1. A lighting apparatus for illumination with a light source comprising:a power source unit arranged to power the light source; a detector unitarranged to detect a deterioration of ability of the power source unitto power the light source; and a determination unit arranged todetermine duration of life of the power source unit in response to thedetector unit.
 2. The lighting apparatus of claim 1, wherein the powersource is arranged to receive electric power from an alternating-currentpower line and includes an rectifier unit arranged to rectify thealternating-current and an electrolytic capacitor arranged to smooth therectified current, and wherein the detector unit is arranged to detect adeterioration of the electrolytic capacitor.
 3. The lighting apparatusof claim 1, wherein the light source includes light emitting diodes, andwherein the lighting apparatus further comprises a second determinationunit arranged to determine duration of life of the light emittingdiodes.
 4. The lighting apparatus of claim 3 further comprising acontroller unit arranged to inform the duration of life of the lightemitting diodes by controlling the light source in response to thesecond determination unit.
 5. The lighting apparatus of claim 4, whereinthe controller is arranged to control the light source not to light. 6.A lighting apparatus for illumination with a light source includinglight emitting diodes comprising: a power source unit arranged to powerthe light source; a determination unit arranged to determine duration oflife of the light emitting diodes; and a controller unit arranged toinform the duration of life of the light source unit by controlling thelight source in response to the determination unit.
 7. The lightingapparatus of claim 6, wherein the controller is arranged to control thelight source not to light for informing the duration of life.
 8. Thelighting apparatus of claim 6, wherein the controller is arranged tocontrol the light source to periodically change the lighting forinforming the duration of life.
 9. The lighting apparatus of claim 6,wherein the controller is arranged to control the light source to reducethe lighting for informing the duration of life.
 10. The lightingapparatus of claim 6, wherein the controller is arranged to control thelight source to light a part of the light emitting diodes for informingthe duration of life.
 11. The lighting apparatus of claim 6 furthercomprising a directing unit arranged to direct the light source to turnon or off, wherein the controller is arranged to control the lightsource for informing the duration of life in response to the directionby the directing unit.
 12. The lighting apparatus of claim 11 furthercomprising a recording unit arranged to record the duration of lifedetermined by the determination unit, wherein the controller unit isarranged to inform the duration of life on the record in response to thedirection by the directing unit.
 13. The lighting apparatus of claim 6further comprising a directing unit arranged to direct the determinationunit to carry out the determination, wherein the controller is arrangedto control the light source for informing the duration of life when thedetermination is carried out.
 14. The lighting apparatus of claim 6further comprising a directing unit arranged to direct the controllerunit to terminate the control of the light source for informing theduration, whereby the light source comes back to ordinary lighting inresponse to the directing unit.
 15. The lighting apparatus of claim 14,wherein the directing unit is arranged to be put a limit on thedirection.
 16. The lighting apparatus of claim 6, wherein the lightingapparatus is for illumination with a first light source and a secondlight source, and wherein the controller unit is arranged to preventboth the first and second light sources from going off ordinary lightingdue to the control for informing the duration of life.
 17. The lightingapparatus of claim 6 further comprising a first test unit for thedetermination unit, a fire alarm apparatus and a second test unit forthe fire alarm apparatus, wherein the second test unit is arranged tolink up with lighting function including the first test unit.
 18. Thelighting apparatus of claim 6 further comprising a directing unitarranged to direct the light source to turn on or off, a fire alarmapparatus and a test unit for the fire alarm apparatus, wherein the testunit is arranged to link up with the directing unit.
 19. A lightingapparatus for illumination with a light source comprising; a powersource unit arranged to power the light source; a directing unitarranged to direct the light source to turn on or off; a fire alarmapparatus; a test unit for the fire alarm apparatus; and a controllerunit arranged to have the test unit link up with the directing unit. 20.The lighting apparatus of claim 19 further comprising a determinationunit arranged to determine duration of life of the light emittingdiodes, wherein the controller is arranged to further control the lightsource for informing the duration of life in response to thedetermination unit and the directing unit.